Unlocked Samsung SGH-T199 QuadBand Global Ready Worldwide GSM Phone with Large Buttons , Web , 3G , Up to 144 Hours of Stand By and 1 Year Warranty Operates on quad band GSM 850, 900, 1800, 1900 MHz and UMTS 1700/2100, 1900 MHz wireless networks .Unlocked to use with AT&T, Net10, H2O, RED POCKET, Ultra Mobile, T-MOBILE, SIMPLE MOBILE and many many more on supported GSM frequencies outside the U.S and WORLDWIDE ! Up to 5 hours of talk time, up to 144 hours (6 days) of standby time NetFront 4.2 Internet Web browser with 3G capabilities for Global Internet NOTE!!! BOX WAS OPEN JUST TO UNLOCK PHONE NEW Music ringtones, Polyphonic ringtones, Vibration, Flight mode, Silent mode, Speakerphone